46295 + Interview Questions in Chemistry

1.	Which one of the following compounds is non-aromatic?
Answer» Which one of the following compounds is non-aromatic?

1.

Which one of the following compounds is non-aromatic?

Answer»

Which one of the following compounds is non-aromatic?

2.	Wurtz reaction fails to explain in case of tertiary alkyl halides reason out
Answer» Wurtz reaction fails to explain in case of tertiary alkyl halides reason out

Discussion

3.	3- pentanol is [RPET 2002]
Answer» 3- pentanol is [RPET 2002]

Discussion

4.	13. What is the oxidation number of sulphur inO8S2-2
Answer» 13. What is the oxidation number of sulphur inO8S2-2

Discussion

5.	What are degenerate orbitals? Which orbitals are degenerated and why?
Answer» What are degenerate orbitals? Which orbitals are degenerated and why?

Discussion

6.	a nonreacting gaseous mixture contains SO2 and SO3 in the mass ratio of 1:5 find the ratio of no of molecules
Answer» a nonreacting gaseous mixture contains SO2 and SO3 in the mass ratio of 1:5 find the ratio of no of molecules

Discussion

7.	Hyperconjugation is maximum for which of the following carbocations?
Answer» Hyperconjugation is maximum for which of the following carbocations?

Discussion

8.	Ammonia has a higher boiling point than phosphene why 1m question
Answer» Ammonia has a higher boiling point than phosphene why 1m question

Discussion

9.	What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? KI–3 H2S––4O6 Fe–––3O4 C––H3CH2OH C––H3C––OOH
Answer» What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? $K {I -}_{3}$ $H_{2} {S - -}_{4} O_{6}$ ${F e - - -}_{3} O_{4}$ $C - - H_{3} C H_{2} O H$ $C - - H_{3} C - - O O H$

9.

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? KI–3 H2S––4O6 Fe–––3O4 C––H3CH2OH C––H3C––OOH

Answer»

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?
$K {I -}_{3}$

$H_{2} {S - -}_{4} O_{6}$

${F e - - -}_{3} O_{4}$

$C - - H_{3} C H_{2} O H$

$C - - H_{3} C - - O O H$

Discussion

10.	Electron gain enthalpy of F− is
Answer» Electron gain enthalpy of $F^{-}$ is

Discussion

11.	5g of sulphur reacts with 8 g of oxygen , in this which one is a limiting reagent ?
Answer» 5g of sulphur reacts with 8 g of oxygen , in this which one is a limiting reagent ?

Discussion

12.	The number of stereoisomers which can be possible for the given compound will be?
Answer» The number of stereoisomers which can be possible for the given compound will be?

Discussion

13.	What is the cathode in electrorefining of copper?
Answer» What is the cathode in electrorefining of copper?

Discussion

14.	Decreasing order of reactivity of HX in the reaction ROH+HX→RX+H2O
Answer» Decreasing order of reactivity of HX in the reaction $R O H + H X \to R X + H_{2} O$

Discussion

15.	22. The electrode potentials for Cu2+ +e- ---> Cu+ and Cu+ +e- --->Cu are +0.15V and +0.50V respectively.The value of E(Cu2+/Cu ) will be 1.0.150V 2.0.500V 3.0.325V 4.0.650V
Answer» 22. The electrode potentials for Cu2+ +e- ---> Cu+ and Cu+ +e- --->Cu are +0.15V and +0.50V respectively.The value of E(Cu2+/Cu ) will be 1.0.150V 2.0.500V 3.0.325V 4.0.650V

Discussion

16.	With dinitrogen, dihydrogen forms:
Answer» With dinitrogen, dihydrogen forms:

Discussion

17.	What is the molarity of 14V H2O2
Answer» What is the molarity of 14V H2O2

Discussion

18.	how to calculate n factor of aluminium sulphate
Answer» how to calculate n factor of aluminium sulphate

Discussion

19.	A strictly planar molecule is optically ___
Answer» A strictly planar molecule is optically ___

Discussion

20.	List IList II1. Plaster of Parisa. CaSO4.2H2O2. Epsomiteb. CaSO4.1/2H2O3. Kieseritec. MgSO4.7H2O4. Gypsumd. MgSO4.H2Oe.CaSO4
Answer» $\begin{matrix} List I & List II 1. Plaster of Paris & a. C a S O_{4} .2 H_{2} O 2. Epsomite & b. C a S O_{4} .1 / 2 H_{2} O 3. Kieserite & c. M g S O_{4} .7 H_{2} O 4. Gypsum & d. M g S O_{4} . H_{2} O e. C a S O_{4} \end{matrix}$

Discussion

21.	both nitrogen and chlorine have an electronegativity of 3 on pauling scale. so if they were to react, would they form a purely covalent bond?
Answer» both nitrogen and chlorine have an electronegativity of 3 on pauling scale. so if they were to react, would they form a purely covalent bond?

Discussion

22.	In case of ideal solution what is the value of the following - ∆S,∆G,∆U (change in entropy,gibb's free energy,internal energy) ?
Answer» In case of ideal solution what is the value of the following - ∆S,∆G,∆U (change in entropy,gibb's free energy,internal energy) ?

Discussion

23.	Q 73/75 Aqueous solution of urea is 20 % by mass of solution. Thenthe percentage by mass of solvent is
Answer» Q 73/75 Aqueous solution of urea is 20 % by mass of solution. Thenthe percentage by mass of solvent is

Discussion

24.	Morphine is used as an
Answer» Morphine is used as an

Discussion

25.	Why does ClO³ dimerises but ClO² doesn't??
Answer» Why does ClO³ dimerises but ClO² doesn't??

Discussion

26.	Benzenediazonium chloride when treated with phenols gives azo dyes, to get best result the pH of the medium should be
Answer» Benzenediazonium chloride when treated with phenols gives azo dyes, to get best result the pH of the medium should be

Discussion

27.	Predict the products of:
Answer» Predict the products of:

Discussion

28.	WHAT IS REACTION AND WHY IT SHOULD BE BALANCED
Answer» WHAT IS REACTION AND WHY IT SHOULD BE BALANCED

Discussion

29.	The product (A) and (B) are respectively
Answer» The product (A) and (B) are respectively

Discussion

30.	56 g of iron reacts with dilute H2SO4 at 30 oC. Work done (in cal) in: (I) a closed vessel of fixed volume(II) an open vesselis:(given molar mass of Fe is 56 g/mol)
Answer» $56 g$ of iron reacts with dilute $H_{2} S O_{4}$ at $30^{o} C$ . Work done (in cal) in: $(I)$ a closed vessel of fixed volume $(I I)$ an open vessel is: (given molar mass of $F e$ is $56 g/mol$ )

Discussion

31.	Which of the following compound on nitration gives higher percentage of para-subtituted product?
Answer» Which of the following compound on nitration gives higher percentage of para-subtituted product?

Discussion

32.	10. What happens when 1,1 - dichloroethane treated with NaOH
Answer» 10. What happens when 1,1 - dichloroethane treated with NaOH

Discussion

33.	KMnO4 acts as an Oxidising agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidised to
Answer» $K M_{n} O_{4}$ acts as an Oxidising agent in alkaline medium. When alkaline $K M_{n} O_{4}$ is treated with KI, iodide ion is oxidised to

Discussion

34.	Asample of drinking water was found to be severely contaminated withchloroform (CHCl3)supposed to be a carcinogen. The level of contamination was 15 ppm(by mass):(i) express this in percent by mass(ii) determine the molality ofchloroform in the water sample.
Answer» A sample of drinking water was found to be severely contaminated with chloroform (CHCl₃) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass): (i) express this in percent by mass (ii) determine the molality of chloroform in the water sample.

34.

Asample of drinking water was found to be severely contaminated withchloroform (CHCl3)supposed to be a carcinogen. The level of contamination was 15 ppm(by mass):(i) express this in percent by mass(ii) determine the molality ofchloroform in the water sample.

Answer»

A
sample of drinking water was found to be severely contaminated with
chloroform (CHCl₃)
supposed to be a carcinogen. The level of contamination was 15 ppm
(by mass):

(i)
express this in percent by mass

(ii)
determine the molality of
chloroform in the water sample.

Discussion

35.	what is suspension?
Answer» what is suspension?

Discussion

36.	The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in an acidic solution is:
Answer» The number of moles of $K M n O_{4}$ that will be needed to react completely with one mole of ferrous oxalate in an acidic solution is:

Discussion

37.	In a certain binary compound of nitrogen and hydrogen,the percentage of hydrogen is 2.3% by weight.then the compound is
Answer» In a certain binary compound of nitrogen and hydrogen,the percentage of hydrogen is 2.3% by weight.then the compound is

Discussion

38.	In P4O10 how many coordinate bond and covalent bond present?
Answer» In P4O10 how many coordinate bond and covalent bond present?

Discussion

39.	Alkenes usually show which type of reaction
Answer» Alkenes usually show which type of reaction

Discussion

40.	What is difference in isotropy and anisotropy?
Answer» What is difference in isotropy and anisotropy?

Discussion

41.	4) Tt9. Total number of pTt-prt and pT-drt bonds respectivelyin SO3 is(2) 2,1(4) 0, 3(3) 3, O
Answer» 4) Tt9. Total number of pTt-prt and pT-drt bonds respectivelyin SO3 is(2) 2,1(4) 0, 3(3) 3, O

Discussion

42.	The energy gap of silicon is 1.14 eV. What is the maximum wavelenght at whick silicon will beginabsorbing energy?
Answer» The energy gap of silicon is 1.14 eV. What is the maximum wavelenght at whick silicon will beginabsorbing energy?

Discussion

43.	Arrange the following polymers in increasing order of their intermolecular forces. (i) Nylon 6, 6, Buna-S, Polythene. (ii) Nylon 6, Neoprene, Polyvinyl chloride.
Answer» Arrange the following polymers in increasing order of their intermolecular forces. (i) Nylon 6, 6, Buna-S, Polythene. (ii) Nylon 6, Neoprene, Polyvinyl chloride.

43.

Arrange the following polymers in increasing order of their intermolecular forces. (i) Nylon 6, 6, Buna-S, Polythene. (ii) Nylon 6, Neoprene, Polyvinyl chloride.

Answer»

Arrange the following
polymers in increasing order of their intermolecular forces.

(i) Nylon 6, 6,
Buna-S, Polythene.

(ii) Nylon 6,
Neoprene, Polyvinyl chloride.

Discussion

44.	metal ammines can be obtained by direct addition of metal salt to liquid ammonia . if 0.001M AgCl is mixed with 0.001M NH3 , number of moles of [Ag(NH3)2]Cl obtained are
Answer» metal ammines can be obtained by direct addition of metal salt to liquid ammonia . if 0.001M AgCl is mixed with 0.001M NH3 , number of moles of [Ag(NH3)2]Cl obtained are

Discussion

45.	Find out total number of substrates those can not undergo Cannizzaro's reaction.
Answer» Find out total number of substrates those can not undergo Cannizzaro's reaction.

Discussion

46.	The product formed in the following reaction is
Answer» The product formed in the following reaction is

Discussion

47.	Specific conductivity of 0.01N H2SO4 solution is 6×10^-3 S cm^-1. It's molar conductivity is
Answer» Specific conductivity of 0.01N H2SO4 solution is 6×10^-3 S cm^-1. It's molar conductivity is

Discussion

48.	Steam at a pressure of 20 bar and 250°C enters a turbine and leave finally at a pressure of 0.05 bar. Three feed water heated are used which are operating at 5 bar, 1.5 bar and 0.3 bar. Assume following data for steam.At 20 bar and 250°C, h= 2905 kJ/kg, Enthalpy of steam entering first, second and third feed water heaters are 2600 kJ/kg, 2430 kJ/kg and 2210 kJ/kg respectively. Enthalpy of steam finally leaving the turbine is 2000 kJ/kg.At 5 bar; hf = 640.1 kJ/kg.At 1.5 bar, hf = 467.1 kJ/kg.At 0.3 bar; hf = 289.3 kJ/kg.At 0.05 bar, hf = 137.8 kJ/kg.The mass of bled steam per kg of steam flow at third feed water heater operating at 0.3 bar is ___ kg. (Neglect all pump works) 0.084
Answer» Steam at a pressure of 20 bar and 250°C enters a turbine and leave finally at a pressure of 0.05 bar. Three feed water heated are used which are operating at 5 bar, 1.5 bar and 0.3 bar. Assume following data for steam. At 20 bar and 250°C, h= 2905 kJ/kg, Enthalpy of steam entering first, second and third feed water heaters are 2600 kJ/kg, 2430 kJ/kg and 2210 kJ/kg respectively. Enthalpy of steam finally leaving the turbine is 2000 kJ/kg. At 5 bar; $h_{f}$ = 640.1 kJ/kg. At 1.5 bar, $h_{f}$ = 467.1 kJ/kg. At 0.3 bar; $h_{f}$ = 289.3 kJ/kg. At 0.05 bar, $h_{f}$ = 137.8 kJ/kg. The mass of bled steam per kg of steam flow at third feed water heater operating at 0.3 bar is ___ kg. (Neglect all pump works) 0.084

Discussion

49.	How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given 10−3.35=4.47×10−4
Answer» How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given $10^{- 3.35} = 4.47 \times 10^{- 4}$

Discussion

50.	The correct order of bond strength is N+2,N2 and N−2
Answer» The correct order of bond strength is $N_{2}^{+}, N_{2}$ and $N_{2}^{-}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of the following compounds is non-aromatic?

Wurtz reaction fails to explain in case of tertiary alkyl halides reason out

3- pentanol is [RPET 2002]

13. What is the oxidation number of sulphur inO8S2-2

What are degenerate orbitals? Which orbitals are degenerated and why?

a nonreacting gaseous mixture contains SO2 and SO3 in the mass ratio of 1:5 find the ratio of no of molecules

Hyperconjugation is maximum for which of the following carbocations?

Ammonia has a higher boiling point than phosphene why 1m question

What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? KI–3 H2S––4O6 Fe–––3O4 C––H3CH2OH C––H3C––OOH

Electron gain enthalpy of F− is

5g of sulphur reacts with 8 g of oxygen , in this which one is a limiting reagent ?

The number of stereoisomers which can be possible for the given compound will be?

What is the cathode in electrorefining of copper?

Decreasing order of reactivity of HX in the reaction ROH+HX→RX+H2O

22. The electrode potentials for Cu2+ +e- ---> Cu+ and Cu+ +e- --->Cu are +0.15V and +0.50V respectively.The value of E(Cu2+/Cu ) will be 1.0.150V 2.0.500V 3.0.325V 4.0.650V

With dinitrogen, dihydrogen forms:

What is the molarity of 14V H2O2

how to calculate n factor of aluminium sulphate

A strictly planar molecule is optically ___

List IList II1. Plaster of Parisa. CaSO4.2H2O2. Epsomiteb. CaSO4.1/2H2O3. Kieseritec. MgSO4.7H2O4. Gypsumd. MgSO4.H2Oe.CaSO4

both nitrogen and chlorine have an electronegativity of 3 on pauling scale. so if they were to react, would they form a purely covalent bond?

In case of ideal solution what is the value of the following - ∆S,∆G,∆U (change in entropy,gibb's free energy,internal energy) ?

Q 73/75 Aqueous solution of urea is 20 % by mass of solution. Thenthe percentage by mass of solvent is

Morphine is used as an

Why does ClO³ dimerises but ClO² doesn't??

Benzenediazonium chloride when treated with phenols gives azo dyes, to get best result the pH of the medium should be

Predict the products of:

WHAT IS REACTION AND WHY IT SHOULD BE BALANCED

The product (A) and (B) are respectively

56 g of iron reacts with dilute H2SO4 at 30 oC. Work done (in cal) in: (I) a closed vessel of fixed volume(II) an open vesselis:(given molar mass of Fe is 56 g/mol)

Which of the following compound on nitration gives higher percentage of para-subtituted product?

10. What happens when 1,1 - dichloroethane treated with NaOH

KMnO4 acts as an Oxidising agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidised to

Asample of drinking water was found to be severely contaminated withchloroform (CHCl3)supposed to be a carcinogen. The level of contamination was 15 ppm(by mass):(i) express this in percent by mass(ii) determine the molality ofchloroform in the water sample.

what is suspension?

The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in an acidic solution is:

In a certain binary compound of nitrogen and hydrogen,the percentage of hydrogen is 2.3% by weight.then the compound is

In P4O10 how many coordinate bond and covalent bond present?

Alkenes usually show which type of reaction

What is difference in isotropy and anisotropy?

4) Tt9. Total number of pTt-prt and pT-drt bonds respectivelyin SO3 is(2) 2,1(4) 0, 3(3) 3, O

The energy gap of silicon is 1.14 eV. What is the maximum wavelenght at whick silicon will beginabsorbing energy?

Arrange the following polymers in increasing order of their intermolecular forces. (i) Nylon 6, 6, Buna-S, Polythene. (ii) Nylon 6, Neoprene, Polyvinyl chloride.

metal ammines can be obtained by direct addition of metal salt to liquid ammonia . if 0.001M AgCl is mixed with 0.001M NH3 , number of moles of [Ag(NH3)2]Cl obtained are

Find out total number of substrates those can not undergo Cannizzaro's reaction.

The product formed in the following reaction is

Specific conductivity of 0.01N H2SO4 solution is 6×10^-3 S cm^-1. It's molar conductivity is

How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given 10−3.35=4.47×10−4

The correct order of bond strength is N+2,N2 and N−2